Master valves are normally in the fully open position and are " never " opened or closed when the well is flowing ( except in an emergency ) to prevent erosion of the valve sealing surfaces.
12.
A valve cap is important on a Schrader valve because if one is not fitted, dirt and water can enter the outside of the valve, potentially jamming it or contaminating the sealing surfaces and causing a leak.
13.
The regulations say " the test shall not be conducted if there is any hair growth between the skin and the face piece sealing surface such as stubble beard growth, beard, mustache or sideburns which cross the respirator sealing surface ."
14.
The regulations say " the test shall not be conducted if there is any hair growth between the skin and the face piece sealing surface such as stubble beard growth, beard, mustache or sideburns which cross the respirator sealing surface ."
How to say sealing surface in Hindi and what is the meaning of sealing surface in Hindi? sealing surface Hindi meaning, translation, pronunciation, synonyms and example sentences are provided by Hindlish.com.
